STMicroelectronics STM32L071RBT6TR

Overview

STM32L071RBT6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM with ECC; features 12-bit ADC (1.14 Msps), dual ultra-low-power comparators, and operates from 1.65 V to 3.6 V across –40 °C to 125 °C - deployed in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the STM32L071RBT6TR datasheet, STM32L071RBT6TR pinout, STM32L071RBT6TR application, or STM32L071RBT6TR equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), 5 µs Flash wakeup time, and 78 I/Os with 5V tolerance - critical for energy-constrained embedded control and sensor fusion designs.

Technical Context

The STM32L071RBT6TR integrates a Cortex-M0+ core with Memory Protection Unit (MPU), supporting dynamic voltage scaling and clock gating to enable multiple low-power modes: Standby (0.29 µA), Stop (0.43 µA), and Run (93 µA/MHz). It includes dual 32-bit watchdogs (independent and window), SysTick, RTC, and 11 timers including an ultra-low-power LPTIM.

Analog subsystem comprises a 12-bit ADC with up to 16 channels (1.14 Msps), two comparators with window mode and wake-up capability down to 1.65 V, internal temperature sensor, and calibrated VREFINT - all operating within the same ultra-low-voltage envelope as the digital core.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for manual soldering, thermal dissipation in compact industrial PCBs, and compatibility with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L072RBT6, the STM32L071RBT6TR lacks hardware crypto but matches its ultra-low-power profile and analog capability; versus STM32L031K6T6, it delivers 6× more Flash, full EEPROM, and richer peripheral set - making it optimal for feature-rich, long-life battery applications demanding both precision and persistence.

Availability

STM32L071RBT6TR is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor networks, industrial predictive maintenance, and portable medical devices requiring stable component supply across extended product lifecycles.

Supply support for STM32L071RBT6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications - engineered specifically for battery-operated devices needing multi-year runtime, robust analog integration, and seamless migration within the STM32 ecosystem.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32L071RBT6TR runs at up to 32 MHz with typical current consumption of 93 µA/MHz when executing code from Flash. At full speed (32 MHz), this equates to approximately 2.98 mA - verified under 3.3 V, 25 °C conditions per DS10690 Rev 7 Section 6.3.4. Dynamic voltage scaling further reduces current at lower frequencies.

Does STM32L071RBT6TR support hardware encryption or secure boot?

No - the STM32L071RBT6TR does not integrate hardware AES, PKA, or secure boot circuitry. These features are present in the pin-compatible STM32L072xx variant. For secure firmware validation or encrypted communication, external crypto co-processors or software-based libraries must be used with this part.

How many I/O pins support 5V tolerance, and are they configurable per pin?

78 of the 84 fast I/Os are 5V tolerant, as confirmed in Section 2.1 and Table 2 of DS10690 Rev 7. Tolerance is inherent to the I/O structure and cannot be disabled or configured per pin - all designated 5V-tolerant pins operate safely with 5V inputs regardless of VDD level (1.65–3.6 V).

What is the endurance and data retention specification for the integrated 6 KB EEPROM?

The on-chip 6 KB data EEPROM guarantees 100,000 write/erase cycles and 20-year data retention at 55 °C (Section 6.3.11, Table 52). ECC protection detects and corrects single-bit errors, ensuring reliability in mission-critical logging and calibration storage without external EEPROM.